diff --git a/src/imodmodel/functions.py b/src/imodmodel/functions.py
index 9ad77dd..67541fe 100644
--- a/src/imodmodel/functions.py
+++ b/src/imodmodel/functions.py
@@ -10,7 +10,7 @@ def read(filename: os.PathLike, annotation: str = 'contour') -> pd.DataFrame:
     Parameters
     ----------
     filename : filename to read
-    annotation: which annotation of the model to return ['contour', 'slicer_angle'] (default: 'contour')
+    annotation: which annotation of the model to return ['contour', 'slicer_angles'] (default: 'contour')
     """
     model = ImodModel.from_file(filename)
     return model_to_dataframe(model,annotation)
diff --git a/tests/test_functional_api.py b/tests/test_functional_api.py
index 7ee3620..6c062e3 100644
--- a/tests/test_functional_api.py
+++ b/tests/test_functional_api.py
@@ -18,18 +18,19 @@ def test_read(two_contour_model_file, meshed_contour_model_file, slicer_angle_mo
         assert isinstance(contour_df, pd.DataFrame)
         assert all(col in expected_contour_columns for col in contour_df.columns)
 
-
     for file in example_slicer_angle_files:
-        slicer_angle_df = imodmodel.read(file,annotation='slicer_angle')
+        slicer_angle_df = imodmodel.read(file, annotation='slicer_angles')
         assert isinstance(slicer_angle_df, pd.DataFrame)
         assert all(col in expected_slicer_angle_columns for col in slicer_angle_df.columns)
 
+
 def test_no_slicer_angles(two_contour_model_file):
     """Check that an error is raised if a model with no slicer_angles is read with the 'slicer_angle' annotation."""
-    with pytest.raises(ValueError,match="Model has no slicer angles."):
-        df = imodmodel.read(two_contour_model_file, annotation='slicer_angle')
+    with pytest.raises(ValueError, match="Model has no slicer angles."):
+        df = imodmodel.read(two_contour_model_file, annotation='slicer_angles')
+
 
 def test_unknown_annotation(two_contour_model_file):
     """Check that an error is raised if an unknown annotation is requested."""
-    with pytest.raises(ValueError,match="Unknown annotation type: unknown"):
+    with pytest.raises(ValueError, match="Unknown annotation type: unknown"):
         df = imodmodel.read(two_contour_model_file, annotation='unknown')